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In what two ways is it possible to generate a higher voltage in a moving conductor?
The two ways of generating a higher voltage in a moving conductor are: 1. Increasing the speed of relative motion between the coil and the magnet 2. Increasing the strength of magnetic field.
Uniform And Non-Uniform Magnetic field And Calculation of its strength?
The answer depends on the source of the magnetic field. For instance, the magnetic field due to a current carrying wire is given by the formula mu*I/(2*pi*r). Magnetic fields follow the principle super position so they can be added up no problem.
Why it is an advantage for armature to rotate in radial magnetic field rather than uniform?
1.maximum torque is experienced 2.torque is uniform for all positions of coil
How does changing current affect the magnetic force on a wire suspended in a magnetic field?
Current passing through a wire in a magnetic field creates its own magnetic force in some direction. If you increase the current, force will be increased. If the direction of current is changed, direction of force will also be reversed. Direction of current is found by applying right hand rule.
What is the unit for magnetic force?
The SI unit for force is the newton, N = kg m s-2. Magnetic field strength is measured in tesla, T = V s m-2 (or N A-1 m-1, or kg A-1 s-2, etc.). The strength of Earth's magnetic field is about 3 x 10-5 T.
In what two ways is it possible to generate a higher voltage in a moving conductor?
The two ways of generating a higher voltage in a moving conductor are: 1. Increasing the speed of relative motion between the coil and the magnet 2. Increasing the strength of magnetic field.
Do the induced voltage increase in a transformer when the magnetic field strength increase?
Yes, the more voltage you put in the more you get out. If the transformer is a 2 - 1 ratio and you put 240 in you get 120 out and when you put 480 in you get 240 out. Magnetic field strength and voltage have a direct relationship. +++ The field strength is actually a function of current, although as you say, increasing the voltage will increase the current hence the magnetic field.
At which location is the magnetic field the strongest?
magnetic poles
How do you increase current in electromagnet?
1. Increase the strength of the magnetic field. (More field lines to be cut by wire, therefore more voltage induced) 2. Move the magnet - or the wire - more quickly. (More field lines cut per second, therefore more voltage induced) 3. More coils in wire. (A single straight wire moved in a magnetic field will cut the lines once, but a coil of wire will cut the lines twice. More coils, more cutting, more induced voltage).
What are the two parts of a sunspot?
Main Parts of a Sunspot are: 1. Umbra (stronger magnetic field) 2. Penumbra (weaker magnetic field)
At which location is earths magnetic field the strongest?
2
Name the types of alternators based on their rotor construction?
1) Rotating armature alternator, rotates in stationary magnetic field. 2) Rotating field alternator, the magnetic field is rotating.
What does magnetic mean in science terms?
A magnetic field is a field of force produced (1) by moving electric charges, (2) by electric fields that vary in time, and (3) by the intrinsic magnetic field of elementary particles associated with the spin of the particle.
What are ways to increase friction?
1)increasing the roughness of the surface 2)increasing the mass of the object
Uniform And Non-Uniform Magnetic field And Calculation of its strength?
The answer depends on the source of the magnetic field. For instance, the magnetic field due to a current carrying wire is given by the formula mu*I/(2*pi*r). Magnetic fields follow the principle super position so they can be added up no problem.
How can the strength of an electromagnet be increased?
More currents, or more loops.
What are two ways of making electromagnets stronger?
1. By increasing the number of turns of coil wound 2. BY using cores B = Ur Uo n I Here magnetic induction B is equated to relative magnetic permeability Ur of the core material and Uo the magnetic permeability of free space. N- the number of turns on the coil and I the current passing
